<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
   <button onclick="alert ('点点点')">点一点</button>
   <button onclick="alert('点了点了')"> 小点点</button>


   <button onclick="fnl()">dianhanshu</button>
   <script>
    function fnl(){
        alert("dianjihanshu")
    }
   </script>
  
</body>
</html>